.subject{
	font-size:30px;
	color: red;
	text-align: center;
}
.bt{
	font-size:20px;
	color: green;
	text-align: center;
}

.zw{
	font-size:15px;
	color: black;
	line-height:25px;
}
.key{
	text-decoration: bold;
	color: red;
}
li{
	line-height:25px;
}

